class MyClassA11(object):

    @staticmethod
    def hello():
        print("i m hello in modulea.file1.MyClassA11")


class MyClassA12(object):

    @staticmethod
    def hello():
        print("i m hello in modulea.file1.MyClassA12")

    @staticmethod
    def callOther():
        MyClassA11.hello()

# MyClassA12.callOther()